A valid MS-DOS or OS/2 8.3 file name (with up to 8 characters followed by a period and an extension of up to 3 characters) that a computer running any member of the Windows Server2003 family, or any similar operating system, creates for every Macintosh folder name or file name on the server. Personal computer users refer to files on the server by their short names; Macintosh users refer to them by their long names.